# 4udo vs Penna

The clearest difference is in-app purchases: 4udo at none against Penna's 1. 4udo also leads on iOS requirement (16.0 vs 18.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Penna sells 1 one-off in-app purchase. 4udo asks for nothing beyond the download.

4udo ships an update every 6 days, Penna every 4 days. The most recent releases landed on October 7, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | 4udo | Penna |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/penna-adhd-visual-schedule/id6777857054/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 days | **Every 4 days** |
| Monetization | — | Free with in-app purchases |
| Size | 7 MB | 16 MB |
| Requires iOS | **16.0** | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Sergey Sukhov](https://appshunter.io/developer/1839678896) | [NTSAUTOSIGA LLC](https://appshunter.io/developer/1896638186) |

## What reviewers say

### 4udo

[App page](https://appshunter.io/ios/app/4udo/id6758681257)

**Features:** macOS Compatibility

**In-app purchases:** none


### Penna

[App page](https://appshunter.io/ios/app/penna-adhd-visual-schedule/id6777857054)

This offline planner uses on-device AI to break down large tasks into smaller steps and organize your thoughts visually. It prioritizes privacy with no accounts, cloud storage, or data collection, offering encrypted backups and export options.

**Highlights:** On-device AI task breakdown, Visual snap-grid board, Offline functionality, Brain Dump for thoughts, Smart text input, Encrypted backups, Pomodoro focus timer

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Penna Pro | $11.99 | one-time |


## Frequently asked questions

### Is 4udo free?

4udo is free to download, with no in-app purchases.

### Is Penna free?

Penna is free to download, with in-app purchases available.

### Do 4udo or Penna have ads?

Neither 4udo nor Penna shows ads.

### Which is updated more often, 4udo or Penna?

4udo ships an update every 6 days, and Penna every 4 days. Most recently, 4udo was updated on October 7, 2026 and Penna on October 8, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*